This paper gives a detailed description of the design of a superconducting permanent magnet synchronous motor. The parameters of the motor have been identified, and the torque equation has been stated. A direct torque control algorithm is introduced and applied to a traditional permanent magnet synchronous motor and the superconducting permanent magnet synchronous motor described in this paper. The motor performance shows that the direct torque control algorithm provides excellent control to the superconducting motor, and guarantees that the magnitude of the operational armature currents is smaller than the value of the critical current of the superconducting tape used for stator winding.(Some figures in this article are in colour only in the electronic version) Nomenclature i d , i q d, q axis stator currents (in amperes) I c superconductor critical current (in amperes) k p , k i proportional and integral gain of PI controller L asas , L bsbs , L cscs self-inductances of a, b, and c phase (in henrys) L asbs mutual-inductance between phase a and b (in henrys) L asfd mutual-inductance between phase a and field (in henrys) L fdfd self-inductance of equivalent field winding (in henrys) L d , L q d, q axis synchronous inductances (in henrys) p number of pole pairs P power capacity (in watts) T electromagnetic torque v d , v q d, q axis stator voltages (in volts) λ f back emf constant (in webers) λ d , λ q d, q axis flux linkages (in webers) ω r rotational speed (in radians per second)
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.